Boiler installation



NOV. 8, 1932. w slEGERls-r 1,887,141

BOILER INSTALLATION Filed March 5. 1929 E /7 Jay: 2z 25 `24 ff/MY? 5%? -g ,20a gq "751 ,4

/Z L t Z/Ur/Z/L Q j l j if 1NvEx`\1TOR @da J Patented Nov. 8, 1932 UNITED srATi-:sl PATENT vori-ica WALTER SIEGERIST, OFV BAYSIDE,`. NEW YORK, ASSIGNOR T0 INTERNATIONAL CM- K BUSTION ENGINEERING CORPORATION, 0F NEW YORK, N. Y., A vCORI?RA'JION 0F DELAWARE y l Application filed March 5,

The invention relates to boiler installa-r tions and is particularly directed to improvements in the arrangement of steam purifiers or separators in boiler installations having water walls in the combustion chambers thereof.

One of the primary objects of my invention is `to provide a boiler installation including a steam purifier in which separated water from the purifier is returnedto the boiler in an effective manner.L

More specifically it is an object of my invention to provide aboiler installation in,- cluding water walls in the combustion chamber and a steam purifier in which separated water from the purifier is returned to the boiler through a water wall or walls. y

Another object is to provide an installation of the character described in vwhich separated Water fromthe purifier is delivered' into the boiler circuit at such point or points 'as will be advantageous from the standpoint of head conditions. y Y.

A further object is to provide a boiler installation including a multi-stage purifier iny which separated water `from the various stages is returned to the boiler at various low points therein. v

I-Iow the foregoing, together' withy such other objects and advantages as may hereinafter appear, or are incident to my invention, are realized, is illustrated in preferred form in the accompanying drawing, wherein- Fig. l is a more or less diagrammatic sectional elevation throughv a boiler installap tion constructed in accordance with my invention, and

Flg. 2 1s a similar view illustrating a modification of the invention.

In the drawing the boiler A, which is illustrated as being of the Stirling type, is provided with a combustion chamber B located in front of and largely beneath the boiler.

The combustion chamber is provided with water walls defining combustion space, and in the drawing a front water wall C and a rea-r water wall D are shown.

The front water wall C is composed of two sets of upright tubes 3 and 4, each comprised of a plurality of closely spaced boiler .IBOILER INSTALLATION v i929. serial No. 344,259.

tubes. The tubes of the lower set 3 are connected at their lower endsinto a header 5 and at theirv upper ends into a header 6. The tubes of the upper set 4 are connected at their lower ends into the header 6 and at their upper ends into the header 7 Thus, it will be seen that the two sets in effect constitute a single front water wall. Water is delivered to this water wall by means offdowncomers 8 leading from the lower drum 9 of the boiler A to the lower header 5 'of the wall, andthe tubes of the wall deliverinto the upper drum 10 of the boiler through the medium of a plurality of roof tubes 11.

' The rear water wall D is composed of a plurality of upright closely spaced boiler tubesy 12 connected at their lower ends into the lower header 13 and at their upper ends into the drum 9. Water is Vdelivered to this wall by means of downcomers 414 leading from the drum 9 to the header 13, and the tubes of the wall deliver'into the drum 9.

A steam purifier or separator 'Eis associated with the boiler and may be of any suitablel type. The purifier is preferably located slightly above and'adjacent to the upper steam and water drum 15 ofthe boiler A connection 16 -delivers steam from the boiler to the purifier andan outlet 17 is provided for steam take-ofi".

The purifier or separator operates toreniove moisture from theV steam which collects in the'lower portion thereof.V

'In order to avoid wasting the collectedv water, I propose to return the water into the boiler circulation, and I contemplate the accomplishment of this in a novel manner whereby substantial quantities of water may be returned very effectively.

Referring to Fig. 1, it will be seen that a downcomer 18 leads separated water from the lower portion of the purifier E to the lower header 5 of the front water wall C, and that adowncomer 19 leads separated water fromy the purifier to the lower header 13 of the rear water wall D.V I may also lead water from the purifier to the lower drum 9 of the boiler, as means of a doWn-. comer 20. I prefer to provide each of the downcomers 18, 19 and 2O with check valves as diagrammatically illustrated at 21.

The particular type of purifier illustrated is a horizontally disposed multi-stage one, and in the form illustrated in Fig. 1 each stage is c onnected to a different head point of the installation. For example, the first stage 22 is connected to lower boiler drum 9, the second stage 23 to the lower rear wall header 13, and the, third stage 24- to the lower front wall header 5.

In the form illustrated in Fig. 2 all of the stages are connected to the lower front wall header 5 by means of pipes 18a, 19a and 20a leading to a common pipe 9.5 which, in turn, leads to the header 5. Check valves in the pipes 18a., 19a and 20a, are indicated at 21a.

By leading water from the purifier E to the boiler A through the water walls to which the connection is made at a low point, there is provided a very effective arrangement for the reason that inasmuch as the water walls are subject to radiant heat, and consequently do considerable work, the mixture in the tubes of the wall is of mu-ch lower density than the substantially solid water in the downcomers leading from the purifier.

`Under normal operating conditions the water in the downcomers 1S, 19 and 2O will be of greater density so that normally there will always be a down circulation. Vith respect to the downcomers 8 and to the downcomers 18 this is also true and the water contained therein is of much more density i than the mixture in the front wall in consequence of which there will normally be a downflow in both sets of tubes.

Statedin another way the downcomer 18, for e'Xample,--may be considered as one leg of a Uf-tube, and t-hetubes of the water wall C may be considered 'as the other leg thereof, and owing to the fact that there is rapid evaporation in the tubes of the wall, they will contain a mixture of water and steam which is materially less dense than the watercoutaining no steam, which is in the downcomer 18 located outside of the hot zone of theinstallation. Therefore, itV may be said that .l utilize the additional head obtained due to the lower density of the mixture of steam and water in the water walls to aid in discharging water from the purifier to the boiler. The same applies, only in a somewhat less degree,

to the connection 19 leading to the rear Water wall D.

I claim 1. The combination with a water tube boiler of a combustion chamber therefor having a wall defined by upright boiler tubes connected into the boiler circulation, a steam separator, a connection for leading steam from `the boiler to the separator, and meansV for discharging moisture from the separator into the boiler comprising do'wncomers outside the boiler circulation for leading the moisture to the upright boiler tubes.

2. The combination with a water tube boiler, of a combustion chamber therefor,

rows of boiler tubes defining walls of thc combustion chamber, lower headers into which the tubes of said rows are connected, downcomer means for leading water to said headers from the boiler, said tubes being connected to deliver to the boiler, a steam separator, a connection for leading steam from the boiler to the separator, and downcomer means outside the boiler circulation for leading water from the separator to the boiler through said water walls.

The combination with a water tube boiler, of a combustion chamber therefor, rowsof boiler tubes in the chamber connected into the boiler circulation and defining combustion space, a multi-stage` steam sep arator connected to the boiler to receive steam therefrom, and downcomer means connecting each stage of the separator to a different low point in the boiler circuit.

4. The combination with a water tube boiler, of a combustion chamber therefor the majorportion of which is located below the level of the boiler, rows of upright tubes in the chamber arranged t0 define combustion space and extending upwardly from the 9'- lower portion of the chamber, headers into which the lower ends of the tubes of said rows are connected, said tubes beingconnected atV their upper ends to deliver into theA boiler, downcomer means leading from the boiler to said* headers, a steam separator connected to the boiler to receive steam therefrom, and downcomer means outside the boiler circulation leading from the steam separator to the lower headers whereby wa-v ter is supplied to the upright tubes from the separator.

In testimony whereof I have hereunto signed my name. A Y

WALTER SIEGERIST.

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